6... e8e7  7. c3b5 This looks like a strange move to me, but the computer doesn't consider it wrong. 7... a7a6  8. b5c3 By going up and down with the knight, the b6-square has been weakened and I think this was Keymer's plan. He now can consider capturing on b6 in a better version, but Firouzja also has some ideas. 8... b4c3 